#include <glad/glad.h>
#include <glfw3.h>
#include <iostream>

#include "YYHOpenGLDrawer.h"

void framebuffer_size_callback(GLFWwindow* window, int width, int height);
void processInput(GLFWwindow *window);


int main()
{
	YYHOpenGLDrawer * OGDrawer = new YYHOpenGLDrawer();
	glfwInit();
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
	//glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);

	GLFWwindow* window = glfwCreateWindow(800, 600, "LearnOpenGL", NULL, NULL);
	if (window == NULL)
	{
		std::cout << "Failed to create GLFW window" << std::endl;
		glfwTerminate();
		return -1;
	}
	glfwMakeContextCurrent(window);

	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
	{
		std::cout << "Failed to initialize GLAD" << std::endl;
		return -1;
	}

	glViewport(0, 0, 800, 600);

	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);

	OGDrawer->init();

	while (!glfwWindowShouldClose(window))
	{
		processInput(window);

		OGDrawer->Render();

		glfwSwapBuffers(window);
		glfwPollEvents();
	}

	delete OGDrawer;
	OGDrawer = nullptr;
	glfwTerminate();
	return 0;
}

void framebuffer_size_callback(GLFWwindow * window, int width, int height)
{
	glViewport(0, 0, width, height);
}

void processInput(GLFWwindow *window)
{
	if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)
	{
		glfwSetWindowShouldClose(window, true);
	}
}